CVE-2022-50511
- Source
- https://cve.org/CVERecord?id=CVE-2022-50511
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-50511.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2022-50511
- Downstream
- Related
- Published
- 2025-10-07T15:19:08.159Z
- Modified
- 2026-04-11T12:44:57.267283Z
- Summary
- lib/fonts: fix undefined behavior in bit shift for get_default_font
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
lib/fonts: fix undefined behavior in bit shift for getdefaultfont
Shifting signed 32-bit value by 31 bits is undefined, so changing significant bit to unsigned. The UBSAN warning calltrace like below:
UBSAN: shift-out-of-bounds in lib/fonts/fonts.c:139:20 left shift of 1 by 31 places cannot be represented in type 'int' <TASK> dumpstacklvl+0x7d/0xa5 dumpstack+0x15/0x1b ubsanepilogue+0xe/0x4e __ubsanhandleshiftoutofbounds+0x1e7/0x20c getdefaultfont+0x1c7/0x1f0 fbconstartup+0x347/0x3a0 dotakeoverconsole+0xce/0x270 dofbcontakeover+0xa1/0x170 dofbregistered+0x2a8/0x340 fbconfbregistered+0x47/0xe0 registerframebuffer+0x294/0x4a0 __drmfbhelperinitialconfigandunlock+0x43c/0x880 [drmkmshelper] drmfbhelperinitialconfig+0x52/0x80 [drmkmshelper] drmfbdevclienthotplug+0x156/0x1b0 [drmkmshelper] drmfbdevgenericsetup+0xfc/0x290 [drmkmshelper] bochspciprobe+0x6ca/0x772 [bochs] localpciprobe+0x4d/0xb0 pcideviceprobe+0x119/0x320 really_probe+0x181/0x550 __driverprobedevice+0xc6/0x220 driverprobedevice+0x32/0x100 __driverattach+0x195/0x200 busforeachdev+0xbb/0x120 driverattach+0x27/0x30 busadddriver+0x22e/0x2f0 driverregister+0xa9/0x190 __pciregisterdriver+0x90/0xa0 bochspcidriverinit+0x52/0x1000 [bochs] dooneinitcall+0x76/0x430 doinitmodule+0x61/0x28a loadmodule+0x1f82/0x2e50 __dosysfinit_module+0xf8/0x190 _x64sysfinitmodule+0x23/0x30 dosyscall64+0x58/0x80 entrySYSCALL64afterhwframe+0x63/0xcd </TASK>
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50511.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/6fe888c4d2fb174408e4540bb2d5602b9f507f90
- https://git.kernel.org/stable/c/890d91b31f4874361e0df047f57d268a7021cb12
- https://git.kernel.org/stable/c/9c14a85e18a58c102ec223144b7edb5b345c1bea
- https://git.kernel.org/stable/c/c9a9aa02f0fa3318e0ae5774f404419a1b4759ca
- https://git.kernel.org/stable/c/e039929e36818507e90901edae87f6fa8bc81093
- https://git.kernel.org/stable/c/e83b47580a0738361772d6f24286adfdaba57e36
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50511.json
- https://nvd.nist.gov/vuln/detail/CVE-2022-50511
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedc81f717cb9e0bd91dc4b98753cb2705ab0fe2801Fixede039929e36818507e90901edae87f6fa8bc81093Fixedc9a9aa02f0fa3318e0ae5774f404419a1b4759caFixede83b47580a0738361772d6f24286adfdaba57e36Fixed9c14a85e18a58c102ec223144b7edb5b345c1beaFixed890d91b31f4874361e0df047f57d268a7021cb12Fixed6fe888c4d2fb174408e4540bb2d5602b9f507f90